Guardian: As the growing season starts in Bolivia, thousands of families are struggling to cope with droughts in five of nine regions. The lack of water threatens to destroy a significant part of this year’s staple cereal crop, quinoa. Some farmers have begun growing drought-resistant crops, like Brazil nuts, to adapt to this change in climate. (Bolivia now exports 75% of the world’s Brazil nuts, compared to just 20% from Brazil.) These efforts have been painfully slow, however, because they …