impact of coal mining on vegetatio

1960 Valdivia earthquake - Wikipedia

The 1960 Valdivia earthquake (Spanish: Terremoto de Valdivia) or Great Chilean earthquake(Gran terremoto de Chile) of 22 May is the most powerful earthquake ever

Human impact on the nitrogen cycle - Wikipedia

Human impact on the nitrogen cycle is diverse. Agricultural and industrial nitrogen (N)inputs to the environment currently exceed inputs from natural N fixation. As