Think about the last item you threw away. Did you consider where that product ended up, once you threw it away?
The Earth’s growing waste problem can be traced back to a culture that treats virtually every item we buy and own as disposable. Rapid urbanisation, population growth, and industrialisation are key contributors to the burgeoning volumes of waste that humans are producing each year.
But what if there was away to get around that?
Introducing the Circular Economy
Today’s post from BlackRock highlights the key benefits of adopting a circular economy, and examines the factors that will make the biggest impact in the years to come.
A Culture of Consumption
Mass production is making products cheaper, more readily available, and more readily disposable, bringing levels of material comfort unimaginable to previous generations.
Companies are making new products at a frenetic pace to keep up with global demand─consuming finite resources as if the Earth had an infinite supply.
The intense effects of this mass consumption are visible across multiple industries:
- Construction: Construction waste alone is expected to reach 2.2 billion tonnes annually by 2025.
- Fast Fashion: Roughly 87% of clothing is discarded or burned each year, costing US$100 billion.
- Plastics: Over 95% of plastic packaging value is wasted every year, costing up to US$120 billion.
As natural resources decline and waste continues to pile up, our society is at a crossroads.
A Tale of Two Economies
Today, most of the world follows the Take-Make-Waste practices of the linear economy, with little regard for future use of these resources and products. Unfortunately, most of this ends up in landfills─by 2050, we could be producing 3.4 billion tonnes of waste each year.
The circular economy, by contrast, is focused on redesigning our systems, processes, and products to enable goods to be used longer, repurposed, or recycled more efficiently.
The circular economy is a major transformational force that will last decades…investors are increasingly considering sustainability factors when making investment decisions.
Companies and governments that choose to adopt a circular economic model could end up saving €600 billion (US$663 billion) annually─and potentially add €1.8 trillion (US$2 trillion) in additional benefits to Europe’s overall economy.
Designing a Better Future
Three major factors are driving the gradual, global shift to a circular economy.
Companies will need to switch from wasteful to sustainable practices, and many are taking steps towards a better future. The New Plastics Economy Global Commitment was signed in 2018 by over 400 organisations to eliminate plastic waste and pollution.
Regulations such as bans on single-use plastics and international waste imports are growing more stringent, and some governments are also offering tax incentives for corporations that follow sustainable practices.
More consumers are actively researching and questioning the impacts of the products they buy, and consumer demand is showing a preference for reusable products and practices.
While few public companies today are actively using a circular economy, several major brands are leading the way in sustainable business practices.
- Philips: Light-as-a-service that provides access to lighting rather than ownership of lightbulbs
- Levi Strauss: Repurposing old garments into building insulation, upholstery, and new clothing
- Toshiba: First multi-function printer, heat-sensitive erasable toner can do up to five reprints per page
- Renault: Revamped old vehicle drive trains, engines, and gearboxes to almost-new condition
Companies and governments in the circular economy have a structural advantage to solve some of the world’s biggest economic issues ─ giving them a strong, long-term market for goods and services, the potential to lower costs, and open profitable new business streams.
Lasting Impact on People, Planet, and Profit
In order for the circular economic model to achieve widespread adoption, both sustainable investment and partnerships across sectors are needed.
This rally for change is making an impact on financial markets─sustainable investments around the world grew from US$13.3 trillion in 2012 to US$30.7 trillion in 2018.
Healthy economies rely on a healthy environment, and building a circular economy is integral to the future health of our economy, planet, and society.
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Visualizing the Impact of Rising Sea Levels, by Country
Here’s a look at how people around the world could be impacted by coastal flooding by 2100, based on rising sea level projections.
Climate change is already causing sea levels to rise across the globe. In the 20th century alone, it’s estimated that the mean global sea level rose by 11-16 cm.
How much will sea levels change in the coming years, and how will it affect our population?
In the below series of visualizations by Florent Lavergne, we can see how rising sea levels could impact countries in terms of flood risk by the year 2100.
These graphics use data from a 2019 study by Scott Kulp and Benjamin Strauss. Their study used CoastalDEM—a 3D graphics tool used to measure a population’s potential exposure to extreme coastal water levels—and examined rising sea levels under different levels of greenhouse gas (GHG) emissions.
Flood Risk By Region
Which countries will be most severely affected by rising sea levels?
If things continue as they are, roughly 360 million people around the world could be at risk of annual flood events by 2100. Here’s what those figures look like across each region:
On the continent of Africa, one of the countries with the highest number of people at risk of coastal flooding is Egypt.
Over 95% of Egypt’s population lives along the Nile river, with some areas situated at extremely low elevations. The country’s lowest point is 133 m below sea level.
Asia’s population will be more heavily impacted by flooding than any other region included in the dataset.
According to the projections, 70% of the people that will be affected by rising sea levels are located in just eight Asian countries: China, Bangladesh, India, Vietnam, Indonesia, Thailand, the Philippines, and Japan.
One of the most high-risk populations in Europe is the Netherlands. The country has a population of about 17 million, and as of 2019, about half of its population lives in areas below sea level.
The country’s lowest point, the town Nieuwekerk aan den Ijssel, is 6.8 m below sea level.
In North America, the U.S., Canada, and Mexico are expected to see the highest numbers of impacted people, due to the size of their populations.
But as a percentage of population, other countries in Central America and the Caribbean are more greatly at risk, especially in high emission scenarios. One country worth highlighting is the Bahamas. Even based on moderate emission levels, the country is expected to see a significant surge in the number of people at risk of flood.
According to the World Bank, this is because land in the Bahamas is relatively flat, making the island especially vulnerable to sea level rises and flooding.
As South America’s largest country by population and with large coastal cities, Brazil‘s population is the most at risk for flood caused by rising sea levels.
Notably, thanks to a lot of mountainous terrain and municipalities situated on high elevation, no country in South America faces a flood risk impacting more than 1 million people.
By 2100, Polynesian countries like Tonga are projected to see massive increases in the number of people at risk of flooding, even at moderate GHG emissions.
According to Reuters, sea levels in Tonga have been rising by 6 mm each year, which is nearly double the average global rate. The reason for this is because the islands sit in warmer waters, where sea level changes are more noticeable than at the poles.
What’s Causing Sea Levels to Rise?
Since 1975, average temperatures around the world have risen 0.15 to 0.20°C each decade, according to research by NASA.
This global heating has caused polar ice caps to begin melting—in just over two decades, we’ve lost roughly 28 trillion tonnes of our world’s ice. Over that same timeframe, global sea levels have risen by an average of 36 mm. These rising sea levels pose a number of risks, including soil contamination, loss of habitat, and flooding.
As countries are affected by climate change in different ways, and at different levels, the question becomes how they will respond in turn.
What Are the Five Major Types of Renewable Energy?
Renewable energy is the foundation of the ongoing energy transition. What are the key types of renewable energy, and how do they work?
The Renewable Energy Age
Awareness around climate change is shaping the future of the global economy in several ways.
Governments are planning how to reduce emissions, investors are scrutinizing companies’ environmental performance, and consumers are becoming conscious of their carbon footprints. But no matter the stakeholder, energy generation and consumption from fossil fuels is one of the biggest contributors to emissions.
Therefore, renewable energy sources have never been more top-of-mind than they are today.
The Five Types of Renewable Energy
Renewable energy technologies harness the power of the sun, wind, and heat from the Earth’s core, and then transforms it into usable forms of energy like heat, electricity, and fuel.
|Energy Source||% of 2021 Global Electricity Generation||Avg. levelized cost of energy per MWh|
Editor’s note: We have excluded nuclear from the mix here, because although it is often defined as a sustainable energy source, it is not technically renewable (i.e. there are finite amounts of uranium).
Though often out of the limelight, hydro is the largest renewable electricity source, followed by wind and then solar.
Together, the five main sources combined for roughly 28% of global electricity generation in 2021, with wind and solar collectively breaking the 10% share barrier for the first time.
The levelized cost of energy (LCOE) measures the lifetime costs of a new utility-scale plant divided by total electricity generation. The LCOE of solar and wind is almost one-fifth that of coal ($167/MWh), meaning that new solar and wind plants are now much cheaper to build and operate than new coal plants over a longer time horizon.
With this in mind, here’s a closer look at the five types of renewable energy and how they work.
Wind turbines use large rotor blades, mounted at tall heights on both land and sea, to capture the kinetic energy created by wind.
When wind flows across the blade, the air pressure on one side of the blade decreases, pulling it down with a force described as the lift. The difference in air pressure across the two sides causes the blades to rotate, spinning the rotor.
The rotor is connected to a turbine generator, which spins to convert the wind’s kinetic energy into electricity.
2. Solar (Photovoltaic)
Solar technologies capture light or electromagnetic radiation from the sun and convert it into electricity.
Photovoltaic (PV) solar cells contain a semiconductor wafer, positive on one side and negative on the other, forming an electric field. When light hits the cell, the semiconductor absorbs the sunlight and transfers the energy in the form of electrons. These electrons are captured by the electric field in the form of an electric current.
A solar system’s ability to generate electricity depends on the semiconductor material, along with environmental conditions like heat, dirt, and shade.
Geothermal energy originates straight from the Earth’s core—heat from the core boils underground reservoirs of water, known as geothermal resources.
Geothermal plants typically use wells to pump hot water from geothermal resources and convert it into steam for a turbine generator. The extracted water and steam can then be reinjected, making it a renewable energy source.
Similar to wind turbines, hydropower plants channel the kinetic energy from flowing water into electricity by using a turbine generator.
Hydro plants are typically situated near bodies of water and use diversion structures like dams to change the flow of water. Power generation depends on the volume and change in elevation or head of the flowing water.
Greater water volumes and higher heads produce more energy and electricity, and vice versa.
Humans have likely used energy from biomass or bioenergy for heat ever since our ancestors learned how to build fires.
Biomass—organic material like wood, dry leaves, and agricultural waste—is typically burned but considered renewable because it can be regrown or replenished. Burning biomass in a boiler produces high-pressure steam, which rotates a turbine generator to produce electricity.
Biomass is also converted into liquid or gaseous fuels for transportation. However, emissions from biomass vary with the material combusted and are often higher than other clean sources.
When Will Renewable Energy Take Over?
Despite the recent growth of renewables, fossil fuels still dominate the global energy mix.
Most countries are in the early stages of the energy transition, and only a handful get significant portions of their electricity from clean sources. However, the ongoing decade might see even more growth than recent record-breaking years.
The IEA forecasts that, by 2026, global renewable electricity capacity is set to grow by 60% from 2020 levels to over 4,800 gigawatts—equal to the current power output of fossil fuels and nuclear combined. So, regardless of when renewables will take over, it’s clear that the global energy economy will continue changing.
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