Planet Earth

Is it more environmentally friendly to buy a fake Christmas tree, or a real one? © Getty Images

Is it more environmentally friendly to buy a fake Christmas tree, or a real one?

How do we know how fast sea levels are rising? © Getty Images

How do we know how fast sea levels are rising?

Climate Change: problem solved

Climate Change: problem solved

Why do leaves in autumn blow into tornadoes on the street? © Getty Images

Why are autumn leaves blown into mini tornadoes on the street?

Beautiful video of Earth’s biosphere released by NASA © Getty Images

Beautiful video of Earth’s biosphere released by NASA

Climate change © Getty Images

Have we made any difference to climate change yet?

Animals return to site of Chernobyl nuclear disaster © Getty Images

Animals return to site of Chernobyl nuclear disaster

Can sunlight through glass objects really cause house fires? © Getty Images

Can sunlight through glass objects really cause house fires?

How many trees does it take to produce oxygen for one person? © iStock

How many trees does it take to produce oxygen for one person?

Heavy rains and mudslides devastate Peru during El Nino season (AFP/Getty Images)

Is El Nino shielding us from climate change?

Is atmospheric oxygen declining, and does it matter? © Sony DSC

Is atmospheric oxygen declining, and does it matter?

Should we mine the seabed? © Getty Images

Should we mine the seabed?

Why does wind blow in gusts and not at a steady rate? © Getty Images

Why does wind blow in gusts and not at a steady rate?

How did Earth get its name? © iStock

How did Earth get its name?

What is smog and how can it be prevented? © Getty Images

What is smog and how can it be prevented?