1.   The barrel-chested chimp had shrugged off AIDS and kept hepatitis at bay only to die of an infection aggravated by years of darts, needles and biopsies.

2.   Food shortages caused by an inefficient communal farming techniques were aggravated by years of disastrous weather.

3.   Food shortages caused by inefficient communal farming techniques have been aggravated by years of disastrous weather.

4.   Its economy is in shambles with its farm industry crumbling, aggravated by years of floods and other natural disasters.

5.   Its farm industry has been ruined by decades of mismanagement aggravated by years of bad weather.