Anthropogenic Global Warming is a Threat

"Something such as the sun getting brighter causing the planet to receive more energy and warms. When there are more greenhouse gases in the atmosphere the planet warms." When there are more greenhouse gases, sunlight will be prevented from heating the Earth due to the Greenhouse effect. Thus in the long term, the Earth will experience an ice age due to the ultimate reduction in heat energy. When the fuel has been used up, the heat levels will gradually decrease. This is the cause for cyclic nature of global climate change. "It's true in the past climate change was caused by natural forces, but this doesn't mean we cannot cause climate change." Is this meant to indicate that we are not natural? I hope not. Fossil fuels form naturally. They sometimes burn naturally. Helping to burn these fuels is not unnatural, just like lions culling a sick antelope from an otherwise healthy herd. There is no evident benefit of keeping coal in the ground. A more likely explanation for the warmth of the Cretaceous period is the methane generated by the huge amounts of vegetation rotting in the huge dinosaurs digestive systems. Methane is a greenhouse gas. The dinosaurs were then wiped out by meteor impacts, sparing the other animals the cost of living with those methane factories. Or was it because dinosaurs were considered a threat for producing so much greenhouse gas and so were wiped out? I absolutely do not get the link between CO2 buildup and continental drift. Pro basically repeats me on the medieval warm period. I agree about the temperatures. Nothing to dispute there besides to note that the current temperatures are below even Miocene era levels, when volcanic activity has reduced. I have nothing to dispute in Pro"s explanation of CO2 usage. 1. Pro"s [4] is a link to a picture of a section of a paper from 4-5 years before reports on the benefits of elevated CO2 levels. Does Pro agree that later research is better than older research? The rise in CO2 is hardly sudden and the link to [5] is to an article analyzing "Sharply increased insect herbivory during the Paleocene"Eocene Thermal Maximum," not the effect of CO2 on plants. It is an analysis of the insect diet, not on how CO2 levels destroyed plants. I agree that the nutritional quality of SOME plants may decrease. 2. Simple explanation to remove the "threat." Fertilization. Nitrogen is relatively easy to synthesize [1]. Nitrogen is widely used as a fertilizer in the form of ammonium nitrate. There is also the Haber process, which I assume you are familiar with. These negate the "threat" from human activity. More vegetation means that more vegetation would be destroyed means that nitrogen would be recycled at a faster rate. I will not respond to the video. 1-5: I have debunked all of the claims that elevated CO2 levels is harmful to plants. I have shown a way around the nitrogen plateau problem. Thus, an elevation in CO2 would not be a "threat" to the Earth. Therefore, Pro has not fulfilled his BoP to show why Man-made global warming is a threat. There is no indication of this. Satellite data do not record the decrease in sun-heat coming to Earth. The process is the same for both sides. Pro"s opposition to cyclic temperature has been addressed. 1. http://www.organic-chemistry.org...