LONDON: In the Putumayo region of the Colombian Amazon, Segundo Meneses’ daily routine took him to the Chufiya river, its banks verdant and waters alive with catfish and piranha. On one morning seven years ago, he noticed a dark film lapping the shore. Where the river turned a bend, it turned to black. It was an oil slick that he says went on to sicken his young family and poison their cows and pigs.
