A significant portion of green house gas emissions come from methane, which, in terms of its contribution to global warming, is 23 times as powerful as carbon dioxide.A) A significant portion of green house gas emissions come from methane, which, in terms of its contribution to global warming, is 23 times as powerful as carbon dioxide.
B) A significant portion of green house gas emissions comes from methane, which, in terms of its contribution to global warming, is 23 times as powerful as carbon dioxide.
C) A significant portion of green house gases come from methane emissions, which, in terms of its contribution to global warming, is 23 times as powerful as carbon dioxide.
D) A significant portion of green house gases comes from methane emissions, which, in terms of its contribution to global warming, are 23 times as powerful as carbon dioxide.
E) A significant portion of green house gases is methane emissions, which, in terms of its contribution to global warming, is 23 times as powerful as carbon dioxide.