Somali pirates attacked the Sirius Star. This could become more and more common. As natural resources dwindle, there will certainly be more and more violent attempts to seize them.
http://news.yahoo.com/s/ap/20081117/ap_on_re_mi_ea/ml_piracy

According to William deBuys, we should fasten our seat belts. The natural regulation of the mountains and rangelands of New Mexico are now being shaped by man-made influences: fire suppression and overgrazing. The Southwest in the Anthropocene talks about this process and the effects we can expect to come in the upcoming years; it draws a parallel with the drought of the 1950s.
Dot Earth discusses the Anthropocene epoch — a name proposed in 2000 by Paul J. Crutzen. Some earth scientists are pushing to distinguish the manmade biogeochemical era from the Holocene, the epoch that began with the end of the last ice age.