Environmental baselines to enable an assessment of the degree of contamination of soils and agricultural crops by heavy metals have not been established in the majority of African countries.

UNESCO: EARTH SCIENCES FOR SOCIETY

Broadbent is a weather freak who points out that both the 1945 and 1961 Bordeaux vintage were subjected to frosts and heavy rains, respectively, thereby reducing crops to small, thick skinned grapes producing deeply colored, concentrated and tannic vintages.

FORBES: Is Your Portfolio 1961 Ch?teau Latour?

Heavy industry is responsible for high cadmium levels in crops.

WSJ: Review & Outlook: China's Toxic Rice Bowl