Nitro-Hydrogen economy

Will Ammonia beat petroleum an established form of fuel and budding alternative fuel technologies like hydrogen etc.. Unlike petroleum ammonia burns cleanly and produces nitrogen and water (no green house gas). Also storing and transporting Ammonia is much cheaper and easier compared to Hydrogen. Silver Eagles Energy claims that they developed system which can replace the current petroleum based economy. Hope this Nitro-Hydrogen economy will put an end to the current fuel crisis.

Paint the city white

Global warming is on a rise due to a number of reasons, melting ice caps of arctic ocean is one of them. white color reflects more heat than any other color. Melting ice is changing the color of the northern hemisphere from white to a much darker color this is acting as a catalyst in the global warming. Can painting our rooftops white compensate the melting ice effect of the Arctic? My simple logic says yes but no idea to what extent...