EFFECTS ON ECOSYSTEMS
Aquatic system is he largest ecosystem on the Earth. It includes plants and animals that live in the waters such as oceans, rivers and lakes. Change in the temperature of these environments will change the habitat completely. For example fish that lives in colder waters such as salmon may have to change the way they migrate. In addition, warmer water may mea more algae such as red tide. Red tide algae take up oxygen, leaving less for the other plants and animals. The same situation would happen on the land. If there is global warming, ice caps would melt rising the sea levels. This means habitat destruction in many coastal areas that would force animals to flee and look for the higher areas to live. Changing climate would also affect plants. Droughts may mean that certain plants cannot survive. To much carbon dioxide in the air may disrupt how plants breathe and they may not be able to survive. Finally, some animals may not survive the change in climate. This means that food chains will be disrupted all over the world. When species of animals and plants die, those who use them as food will be in trouble as well.
EFFECT ON PEOPLE
When global climate change happen people's health and economy will be affected.
First of all, disruption of ecosystem may bring changes in what food is available and how much. There may not be enough crops to feed all the people. Extreme temperatures are also an issue. If the temperature is higher, some people, especially older, may have strokes and heart attacks from heat. Sun rays from ozone wholes may cause skin cancers. If the temperature decreases, people living in colder areas may suffer diseases related to colder weather like pneumonia. Finally, if there is more greenhouse gases in the are, people may have respiratory problems and also allergies.
Economic effect of climate change will be huge. First of all, if ocean level rises many cities, homes and industries will be destroyed by flooding. Therefore, there will be less jobs and less products. For example, many oil refineries are near water so we may have energy crisis. There will not be enough oil and it will become expensive. Also, many ports that people use to trade will be destroyed so trade would stop. Species of fish may also die so people depending on oceans for food may lose that source.Also, there will be less space to grow food. This may result in famine. Countries that export lots of crops may lose income. When temperature goes up and down people have to use more cooling and heating and that means more cost to people and more use of resources. Some other jobs and industries may be lost. For example fishing industry may be destroyed in many countries because some fish may become endangered or extinct. In addition many people may lose homes and lives in ocean levels rise and glaciers melt because there will be huge flooding. Many any people will become homeless. This means that governments will need to find new places for millions of people to live. There will be less land to put all the people on the Earth.