On April 22nd each year millions of people around the world take part in activities to mark Earth Day. The Earth Day Network was founded in 1970 in the USA and now works with partners in 192 countries to broaden, diversify and mobilize the environmental movement. It focuses on providing opportunities for civic engagement, and 1 billion people participate each year in Earth Day activities, making it the largest civil observance in the world. Some of Earth Day's main programmes and initiatives include Greening Schools, Green Cities, Reforestation, Endangered Species and Climate Change. The focus of Earth Day 2018 is on ending plastic pollution. For more information about Earth Day, see www.earthday.org.
Tom Gilks / Rwandan students arrange solar lamps on a Kigali rooftop as part of Earth Day 2014, April 2015.
Gavin Hellier / Arty view looking up at skyscrapers and trees in downtown Los Angeles, California, USA, July 2011
Ashley Cooper / An AlgaeLink Algae growing system that is harvested to make ethanol and biodiesel Producing oil from algae in this way is much more efficient than from growing traditional plant oil crops like oil see...
Ashley Cooper / Solar panels that focus the suns rays on heat exchangers to boil oil, which is then sent down to the kitchens below to heat the cookers. Muni Seva Ashram, Goraj, near Vadodara, India, December 2013.
Ashley Cooper / AlgaeLink, an algae growing system used to produce ethanol and biodiesel oil from algae. This is more efficient than from growing traditional plant oil crops as it does not take as much space. Chamoni...
Ashley Cooper / Citronella eco logs made from recycled waste material.
SCOTLAND: The Big Picture / Wind turbines at Berry Burn on Altyre Estate, Moray Scotland, UK. July 2016.
Ashley Cooper / E.ON biofuel power station in Lockerbie Scotland with timber supplies/ The power station is fuelled by wood sourced from local woodlands and generates enough electricity to supply 70 000 houses. Scotl...
Philippe Clement / Siemens QC45 unit, triple-outlet rapid charger for electric vehicles / electric cars, Scotland, UK, 2017
Gerrit Vyn / Shanghai air pollution and cityscape, China. October 2013.
Philippe Clement / Dock crane and heap of scrap metal for recycling, Port of Ghent, Belgium, July 2013.
Pat Tuson / Allotment shed made from recycled materials, with a Forsythia shrub to the left, Manor Garden Allotments, Lea Valley, London Borough of Hackney, UK. These allotments were destroyed to make way for the...