Environment | WPN World People News

Drawing of the HMS Challenger survey vessel preparing to measure ocean temperatures by lowering thermometers deep into the ocean on ropes in 1872. A new NASA and University of Tasmania study combined the ship's 135-plus-year-old measurements of ocean temperatures with modern observations to get a picture of how the world's ocean has changed since the Challenger's voyage. The research reveals that warming of Earth can be clearly detected since 1873, with the ocean absorbing the majority of the heat.

Smallholder farmers from Swaziland’s eastern Lubombo District. The country suffers from persistent food insecurity and more than 100,000 people are currently estimated to be food insecure.

In the Oklahoma City suburb of Moore, the recovery from Monday's deadly tornado is picking up speed, even as locals mourn the loss of at least 24 people, including 10 children. Funerals will begin Friday in Moore, and President Obama plans to visit the town Sunday. Resources are pouring in from all over the country to help those in desperate need.

Longview, WA. There are currently three active coal export proposals in Washington and Oregon.

This bipartisan bill seeks to reform the weak and outdated federal law that currently regulates toxic chemicals.

Director-General of the Swiss Agency for Development and Cooperation Martin Dahinden.

Giant panda captured in Wang Lang, Sichuan, China

Sgt. Warren Williams of the 63rd Civil Support Team searches debris in Moore, Okla., in response to the May 20, 2013, EF-5 tornado.

U.S. search and rescue crews are digging for survivors in the area where a massive tornado leveled neighborhoods Monday in the central state of Oklahoma, killing at least 24 people and injuring nearly 240 others. The twister is the nation's deadliest since a 2011 tornado in Joplin, Missouri, killed more than 150 people.

Chinook salmon.