Greenhouse effect. Pie chart that shows different types of gases 809 percent is from carbon dioxide fossil. Long lived greenhouse gases. greenhousegasesemissions. Smokestacks emitting greenhouse gases Photo courtesy Environmental Protection Agency. Figure 1 US Total Greenhouse Gas Emmissions in 2005. You know those small plastic greenhouseboxes where youu0027re supposed to grow seeds in One sunny afternoon can be enough to make them so hot the plants. What Are Greenhouse Gases and Where Do They Come From. Figure 3 Greenhouse gas emissions by source sector EU28 1990 and 2015 percentage of total Source Eurostat envairgge European Environment Agency. A schematic representation of the greenhouse gas effect u2013 here demonstrating greenhouse gases.