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African countries have agreed to cooperate in setting limits for use of lead in paints with a view to phasing it out by 2020. This is because of its dangers to human beings, especially to children, and the environment.

A survey of 10 hot, Jupiter-sized exoplanets conducted with NASA's Hubble and Spitzer space telescopes has led a team to solve a long-standing mystery -- why some of these worlds seem to have less water than expected. The findings offer new insights into the wide range of planetary atmospheres in our galaxy and how planets are assembled.

Of the nearly 2,000 planets confirmed to be orbiting other stars, a subset of them are gaseous planets with characteristics similar to those of Jupiter. However, they orbit very close to their stars, making them blistering hot.

Their close proximity to the star makes them difficult to observe in the glare of starlight. Due to this difficulty, Hubble has only explored a handful of hot Jupiters in the past. These initial studies have found several planets to hold less water than predicted by atmospheric models.

2015 has marked the International Year of Soils, an event that many members of the public missed — but they shouldn’t have, because soil is vitally important for human survival. Ominously, a study from the Grantham Centre for Sustainable Futures indicates that in the last 40 years, humans have chewed through 33 percent of the Earth’s topsoil, thanks to development and harmful farming practices. The grim findings are a bad sign for the future, as we rely on soil not just for sustenance, but also as a carbon trap, key component of nearly every ecosystem on Earth, and breeding ground for organisms with tremendous commercial and humanitarian applications, such as bacteria that could contribute to the development of cutting edge pharmaceuticals. We should be worshiping the ground we walk on, and this study indicates that we’ve been doing just the opposite.

The U.S. has a chance to be a leader in renewable energy deployment given its sheer size and resources. And some states are leading the way. Olivet Nazarene University’s engineering department ranked the top 10 green states in terms of renewable energy. How does your state stack up? Did it make the list? Read on to find out.

Contrary to recent headlines — and a talk by actor Arnold Schwarzenegger at the United Nations Paris Climate Change Conference — eating a vegetarian diet could contribute to climate change. In fact, according to new research from Carnegie Mellon University, following the USDA recommendations to consume more fruits, vegetables, dairy and seafood is more harmful to the environment because those foods have relatively high resource uses and greenhouse gas (GHG) emissions per calorie.