Malaysia's Semenggoh Wildlife Center restores hope for orangutans. Here, they can freely swing from trees and vines — keeping forests intact is vital for animals and humanity.

Could your palm oil be the cause of orangutan murder? Elizabeth Key of Animal Rescue International warns that without action, orangutans and other great apes are facing rapid decline.

Did you know that we (humans) share around 98.8 percent of our genetic profile with chimps and bonobos? We all descended from a single ancestor species that lived around 6 or 7 million years ago.

Safer outside their natural habitat: Kenya's Joseph Mayo says releasing chimpanzees to the wildness endangers them. He has been taking of chimpanzees for more than 25 years.

Large numbers of fish have died in the Rhine River as a result of high water temperatures due to the ongoing heat wave. The cold-loving grayling in northern Switzerland has been hit particularly hard. During the 2003 heat wave, 90 percent of Switzerland's grayling population was wiped out. Now, there are fears the current bout of searing heat will deliver another blow.

People in Kenya's capital Nairobi don't have enough water — authorities have been rationing water supply for a while now. But why is the city's supply of drinking water running low despite heavy rainfall? Linda Staude went to find out and her report is presented by Ineke Mules.

India is suffering the worst water crisis in its history, with millions of lives at risk, according to a recent report of the government policy think tank National Institution for Transforming India. Rajendra Singh is trying to reverse that. He has already restored the water supply to over a thousand villages. He's won the Stockholm Water Prize a few years ago and is still going strong.

During peak season, over 100,000 people come to see one of New Zealand's most famous glaciers per month. But as global temperatures rise, the glaciers are retreating. This takes a toll on the ecosystem ... and on tourism. It's gotten too dangerous to actually hike up all the way to the top of Franz Josef Glacier. David Killick reports from New Zealand.

Costa Rica has been hailed as a green role model as it runs almost completely on renewables. But that comes at a price as Anne-Kathrin Mellmann found out. Her report is presented by Ruby Russell.

The East-African country of Kenya is battling with some major environmental challenges: As sea levels rise due to climate change, its monuments and historical sites by the coast are at risk of disappearing. Diana Wanyonyi went out exploring in the coastal city of Mombasa.