ate the animals that ate the wasps and without food, the cats began to die. And when there were fewer cats, there were more rats. The rats made people ill. and so people were still dying. Now they had a worse problem than before because more people were dying because of the rats than from malaria and that is why 14,000 cats arrived by parachute in the villages of Borneo in the 1950s! 
 Using pesticides was just one problem. After Silent Spring people began to talk about other world problems. How could we live in a world with more people and more rubbish with dirty seas and dirty air? And then there were countries that were very, very rich, and countries that were terribly poor. For a lot of people that was a problem, too 
 In the early 1970s the first political groups with green ideas appeared in Australia and New Zealand. The first political group that used the name "green' was Die Grunen (the Greens) in Germany in the early 1980s 
 What does it mean to be green? The most important thing for all greens is to protect the environment the plants, the animals, the Earth, and the sea. Other important things for many greens are controlling the number of people on the Earth, and making life better for people without doing bad things to the environment 
 WWF is an organization that works for the environment all over the world. It began when a group of scientists became worried about the wildlife in Africa. Sir Julia Huxley and other scientists visiting Africa in the 1960s saw that large numbers of animals were dying. They were afraid that the same problem was happening in other places in the world, too. When WWF began in 1961 its job was to save life on Earth by saving the environment wwF used the picture of a panda as its symbol, because everybody knows this animal with big black eyes. Now