Articles on Greenhouse gases

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Planes can create clouds of tiny ice crystals, called contrails, and some studies suggest they could have an a significant effect on climate. from www.shutterstock.com

Climate explained: how much does flying contribute to climate change?

Globally, emissions from air travel account for only about 3% of the warming human activities are causing, but aviation affects our climate in a number of ways.
In India, air conditioning system vendors waiting for customers during an episode of high heat. Raveendran/AFP

How we can keep our planet cool even as A/C use rises

As our planet warms, the number of air-conditioning units worldwide is expected to triple by 2050 – yet their use drives climate change. So how can we break the cycle?
On June 5-6, 2012, NASA’s Solar Dynamics Observatory collected images of one of the rarest predictable solar events: the transit of Venus across the face of the Sun. NASA/SDO, AIA

Why we need to get back to Venus

This hot, acidic neighbor with its surface veiled in thick clouds hasn't benefited from the attention showered on Mars and the Moon. But Venus may offer insights into the fate of the Earth.
It is vital to find alternative and sustainable sources of protein to meet the considerable challenge of ensuring food security for the future. Shutterstock

Eating insects is good for you — and the planet!

Insects are high in protein and rich in other nutrients and, unlike beef and other livestock, have little impact on climate.

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