Global warming is an increase in the temperature of the earth's atmosphere because of the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants.
Extra greenhouse gases are produced through activities which release carbon dioxide, methane, nitrous oxide and ozone CFCs (chlorofluorocarbons). These activities include: Burning coal and petrol, known as 'fossil fuels' cutting down of rainforests and other forests. A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect.
Measurements of carbon dioxide levels have been taken continuously for 50 years.
Scientists have records of past CO2 levels from ice core studies, which show that CO2 levels are higher today than at any point since our distant ancestors began migrating out of Africa 800,000 years ago.
Scientists say the warming of the planet will continue may accelerate. Oceans will continue to rise as well, but predicting the amount is difficult. A recent study says we can expect the oceans to rise between 2.5 and 6.5 feet, by 2100, enough to swamp many of the cities along the U.S. East Coast. More dire estimates, including a meltdown of the Greenland ice sheet, push sea level rise to 23 feet (7 meters), enough to submerge London.
There seems to be a link between the increase in temperature and the amount of CO2 in our atmosphere. This is backed up by this graph and scientific research.
Bitter or sour oranges are usually not eaten fresh because their flesh is bitter tasting. The sour flavour of these oranges is a result of the fruits’ acidic juices. The bitterness is due to the essential oils. The best known bitter orange varieties are Bouquet de Fleurs, Chinotto, and Seville. Sour oranges need high temperatures to grow, and as a result of global warming, there will be more of them growing.
