[00:01.94]Fresh water

[00:03.71]Rivers, lakes and wet-lands are sources

[00:06.23]of fresh water,not only for humans,

[00:08.50]but for wildlife too.

[00:10.35]Due to pollution and climate change,

[00:12.60]about 50% of the world's fresh water habitats

[00:15.09]have been destroyed in the last 100 years.

[00:19.15]And more than 3 billion people

[00:21.04]in poor countries

[00:22.31]do not have enough clean water.

[00:25.35]The WWF works hard to protect fresh-water

[00:28.53]environment from pollution and to help people

[00:31.87]in developing countries have access to safe,

[00:34.93]clean water.

[00:36.58]Nobody knows exactly how many species of plants

[00:39.27]and animals there are on Earth.

[00:41.45]Scientists say that there would be as many as

[00:44.08]15 million different species.

[00:46.06]Sadly, many species have become extinct

[00:48.92]and many are in danger of extinction.

[00:51.63]But thanks to the hard work of organizations

[00:53.59]like the WWF,

[00:55.55]more and more have a chance to survive.

[00:57.23]