What are the signs of global warming?

Rising Seas— inundation of fresh water marshlands (the everglades), low-lying cities, and islands with seawater. Changes in rainfall patterns — droughts and fires in some areas, flooding in other areas. See the section above on the recent droughts, for example! Increased likelihood of extreme events— such as flooding, hurricanes, etc. Melting of the ice caps — loss of habitat near the poles. Polar bears are now thought to be greatly endangered by the shortening of their feeding season due to dwindling ice packs. Melting glaciers – significant melting of old glaciers is already observed. Widespread vanishing of animal populations — following widespread habitat loss. Spread of disease — migration of diseases such as malaria to new, now warmer, regions. Bleaching of Coral Reefs due to warming seas and acidification due to carbonic acid formation — One third of coral reefs now appear to have been severely damaged by warming seas. Loss of Plankton due to warming seas — The enormous (900 mile long) Aleution island ecosystems of orcas (killer whales), sea lions, sea otters, sea urchins, kelp beds, and fish populations, appears to have collapsed due to loss of plankton, leading to loss of sea lions, leading orcas to eat too many sea otters, leading to urchin explosions, leading to loss of kelp beds and their associated fish populations. Source: http://goo.gl/1mu7E8 Kenya has made negligible contributions of greenhouse gases, why does the country have to be involved in mitigation shouldn’t this be the responsibility of the countries that are most responsible for greenhouse gas emissions? It is true that Kenya and many developing countries in Africa and Asia have contributed minimal levels of GHGs. However, to avoid following the same high emitting development pathways that the current industrialized nations followed, Kenya has chosen to follow a low carbon development pathway hence the emphasis use of clean energy, recycling of waste and afforestation.
Do emissions of carbon dioxide from human activities have a big impact on Earth’s climate?
Plants, oceans, and soils release and absorb large quantities of carbon dioxide as a part of the Earth’s natural carbon cycle. These natural emissions and absorptions of carbon dioxide on average balance out over time. However, the carbon dioxide from human activities is not part of this natural balance. According to the United States Environmental Protection Authority (EPA) Ice core measurements reveal that carbon dioxide levels in the atmosphere are higher than they have been for at least 800,000 years (http://www3.epa.gov/climatechange/science/causes.html#GreenhouseRole). The global warming that has been observed in recent decades was caused by elevated levels of carbon dioxide and other greenhouse gases in the atmosphere, due primarily to human activities.