Earth Day's History and How it Changed Energy Emissions
Every year on 22 April, Earth Day mobilises communities across continents with a shared focus, to confront environmental crises and advocate for a sustainable future.
What started as a national movement in the United States in 1970 now gathers more than one billion people worldwide, many narrowing their attention on climate change, energy use and the systems behind both.
Origins in energy, industry and environmental protest
Earth Day emerged in the 1960s in the United States, a time of unchecked industrial pollution and limited environmental oversight.
Spearheading the movement was Wisconsin Senator Gaylord Nelson, who looked to the energy of anti-war protests and imagined a similar public demonstration centred on ecological threats.
Gaylord’s vision materialised on 22nd April 1970, when 20 million Americans took part in the first Earth Day.
The mobilisation took place across rallies, marches and educational events, reflecting the widespread concern of air pollution from fossil fuels, untreated waste in water systems and industrial disasters such as oil spills.
Student organiser Denis Hayes played a central role in coordinating the event, with backing from the United Auto Workers union led by Walter Reuther.
- The use of pesticides, highlighted in Rachel Carson's "Silent Spring," raised concerns about their impact on the environment and human health.
- Businesses and industries dumped chemicals, waste and plastics into rivers, lakes and the ocean, leading to the discovery of the persistence and fragmentation of plastic into microplastics.
- The effects of acid rain, linked to pollutants like sulfur dioxide and nitrogen oxides from power plants, became a major concern in Europe and North America.
- The US emitted more than 92 million tonnes of pollutants in the 70’s, including nitrogen oxide, non-methane volatile organic compounds and sulfur dioxide, causing respiratory problems and other health issues due to unregulated factories and the growing number of cars.
That same year saw the creation of the Environmental Protection Agency (EPA), while landmark legislations also appeared – the Clean Air Act, the Clean Water Act and the Endangered Species Act all signalled a shift in how energy and industry are intertwined.
“That first Earth Day was so important in part because we brought together a huge basket of different issues: urban air pollution, freeways cutting through neighborhoods, leaded paint, DDT, the Santa Barbara oil spill, rivers catching on fire,” comments Denis.
“Since people will put the most effort into something that’s directly relevant to them, we were very much grassroots. We encouraged people who shared our values to get out and organise and do it within an Earth Day framework.
“Similarly going forward, as you look at something like climate change, there are various different approaches to something akin to a Green New Deal. There are various different threats in different parts of the country. Things that will be relevant in one place will be very different in another, we need to have that latitude.”
Scaling the movement
In 1990, Denis helped transform Earth Day from a US-based action into a global initiative.
That year, 200 million people across 141 countries participated, raising international awareness and setting the stage for events such as the 1992 United Nations Earth Summit in Rio de Janeiro.
Energy emerged as a core theme in subsequent Earth Day events.
In 2000, the focus turned to climate change and clean energy.
By 2016, Earth Day coincided with the signing of the Paris Agreement by 175 countries, a formal commitment to limiting global temperature rises.
In 2020, amid the COVID-19 pandemic, Earth Day marked its 50th anniversary online.
More than 100 million people joined digital climate and energy-related events, making it one of the largest online mobilisations in history.
Business, innovation and the energy transition
Corporations increasingly use Earth Day to showcase changes in how they manage resources, energy and emissions.
These contributions demonstrate how climate commitments and business operations intersect:
- Disney allocates more than US$120m through the Disney Conservation Fund, while also using its media platforms to highlight environmental stories.
- Starbucks aims to certify 10,000 Greener Stores by 2025 and halve its carbon emissions by 2030 through tree planting and reusable cup initiatives.
- Apple has cut its carbon output by 45% since 2015 and aims for full product carbon neutrality by 2030.
- NASA shares Earth observation data and promotes climate science using Earth Day as a public education tool.
- Nike focuses on circular design and releases Earth Day-themed sustainable collections.
- Target works toward 100% recyclable, compostable or reusable packaging via its Target Zero scheme.
- Microsoft’s Xbox division creates carbon-aware consoles and introduces environmental themes into games like Minecraft.
- ASICS incorporates recycled materials and promotes circular economy goals in its product design.
- McDonald’s transitions to cage-free eggs in the US and aims for renewable or recycled packaging.
- Nestlé integrates sustainability across operations and leads cleanup initiatives such as the Nestlé Cares Cleanup in Switzerland.
Alternate Earth Day observances reinforce the message globally.
The Equinox Earth Day, celebrated on 20th March, is founded by peace activist John McConnell and recognised by the United Nations.
Canada’s Earth Day, also on the 22nd April, was launched in 1980, emphasises environmental education and stewardship through tree planting and school programmes.
Earth Day’s energy message
Earth Day's legacy is marked not only by the formation of institutions and laws but by its role in shifting public consciousness around energy and climate.
Gaylord Nelson, whose early leadership earned him the Presidential Medal of Freedom in 1995, helped to ignite a lasting movement rooted in action rather than rhetoric.
Today, Earth Day links local clean-ups with international policy, renewable energy targets with grassroots organising.
It acts as a yearly pulse-check on humanity’s environmental commitments and offers a shared space for both concern and creativity.
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