For that we need to know definition of TERRORISM. Currently the definition as widely known, is limited to killing of human beings by human beings, i.e those who kill innocent people are terrorists or in other words any harm to human society is an act of terrorism. But i disagree, why should it be limited to killing of human beings. Terrorism is an act where someone harms someone, without giving anything in return. Now second part of definiton is important, & this is the reason why furious side of nature, wildlife, do not come in bracket of Terrorists.
Coming back to first part of definition everyone harms….nature causes lot of harms through floods, earthquake etc., the one at pinacle of food chain kills the one under it and so on. But they are not terrorists, because those acts have a purpose & give something vital in return. Its just a give & take scenario. Like flood brings much needed nutrients, predators ensures health of food chain is maintained etc. So these acts of harm have a good side in return.
Now lets apply the definition to human beings. Everybody knows the harm we have done to earth, especially in last two centuaries and ironically we continue to do as bad it can be. Just few of the statistics:
1) In 8000 BC, earth had 4200 million hectares….now its just 187 million hectares…and declining. Just how much killing we have done.
2) In 1960s, there were 3 million elephants in wild, now its just 65000. Just imagine how much blood is tainted in our hands.
3) In 1900, India had ~1,00,000 tigers in wild. In 1960, it was down to 4000 & recent reports shows its just ~1200. Just how much blood shed has happened even for top predator of earth. How much quenched we are in blood.
4) The below graph shows, more horror terror crimes humans have done, which have not spared even the marine species.
This is just 2 statistics from billions available.
Now i won’t write anything…..the following pictures will explain all:
Now read this from Wikipaedia: http://en.wikipedia.org/wiki/Extinction
Main article: Holocene extinction event
Further information: Deforestation
According to a 1998 survey of 400 biologists conducted by New York’s American Museum of Natural History, nearly 70 percent believed that they were currently in the early stages of a human-caused mass extinction, known as the Holocene extinction event. In that survey, the same proportion of respondents agreed with the prediction that up to 20 percent of all living populations could become extinct within 30 years (by 2028). Biologist E. O. Wilson estimated  in 2002 that if current rates of human destruction of the biosphere continue, one-half of all species of life on earth will be extinct in 100 years. More significantly the rate of species extinctions at present is estimated at 100 to 1000 times “background” or average extinction rates in the evolutionary time scale of planet Earth.