What's up with the weather?: The Global Warming Debate

Is there global warming?
Is global warming caused by man?
How can we prevent global warming?
Some say there is Global Warming, and others say it's just a myth. Which is it?
Please post sources and videos if you have them below.

"Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the early 20th century, Earth's mean surface temperature has increased by about 0.8 °C (1.4 °F), with about two-thirds of the increase occurring since 1980. Warming of the climate system is unequivocal, and scientists are more than 90% certain that it is primarily caused by increasing concentrations of greenhouse gases produced by human activities such as the burning of fossil fuels and deforestation. These findings are recognized by the national science academies of all major industrialized nations." ~ from Wikipedia (link source below)