throughout the Earths geological history. Biological evolution, driven by natural climate change, catastrophic geologic events, and competition from better-adapted species, are reasons for billions of species extinction since life on Earth began about three billion years ago. However, in modern times, the rate of extinction is much higher. Scientist state that the present extinction rates are 1 000 to 10 000 times higher than the average natural extinction rate.
Humans can cause either harm or good for other species on the Earth. Humans can help save endangered species by breeding more animals and saving their environment, making sick animals healthy and taking care of those animals which can no longer survive in the wild. Humans can also cause a lot of harm to animals, on purpose or by accident.
When humans destroy wild land to build buildings and roads and so on, the land is changed. Every specie from that area can disappear. Some can move to other areas but there are already other animals. There is not enough space, food and water for everyone.
When farmers spray chemicals on the plants to save them from things which eat the plants (different bugs and molds), those chemicals will also hurt species which do not eat the plants. They can also kill or cause serious damage for the animals which feed from the poisoned bugs.
Some animals are endangered because of their beautiful fur or other parts for example bones, shells or internal organs. Snakes are killed for their skins and bears are killed for their paws etc.
People buy and catch animals to keep as pets, but very often people do not know how to take care of them and 50-90 % of these animals die early because of that.
Link to my survey: http://surveynuts.com/surveys/take?id=27865&c=197172757HTJD
Results will be announced later.
When humans destroy wild land to build buildings and roads and so on, the land is changed. Every specie from that area can disappear. Some can move to other areas but there are already other animals. There is not enough space, food and water for everyone.
When farmers spray chemicals on the plants to save them from things which eat the plants (different bugs and molds), those chemicals will also hurt species which do not eat the plants. They can also kill or cause serious damage for the animals which feed from the poisoned bugs.
Some animals are endangered because of their beautiful fur or other parts for example bones, shells or internal organs. Snakes are killed for their skins and bears are killed for their paws etc.
People buy and catch animals to keep as pets, but very often people do not know how to take care of them and 50-90 % of these animals die early because of that.
Link to my survey: http://surveynuts.com/surveys/take?id=27865&c=197172757HTJD
Results will be announced later.
References:
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