The Deepwater Horizon oil disaster catalyzed a decade of research on oil contamination in the Gulf of Mexico, from surface waters to the seabed, with surprising findings.
If the US military were a country, its carbon emissions would rank between that of Peru and Portugal.
These substances can generate air pollution particles.
The prospect of gas wealth has been escalating old rivalries and disputes between Turkey, Cyprus, Lebanon, Israel, Egypt and Greece.
Why protesters should think about putting their feet up.