Green tree ants swarm over oak blue caterpillars but they are not attacking them. They are drinking a sweet liquid that the caterpillars give off especially to attract the ants. The ants act like living armor, shielding the caterpillar from wasps that might lay eggs on it. The ants and the caterpillars are partners in nature.
The human factor
The human factor New research has found more evidence that
industrial greenhouse gases have significantly contributed to
global warming over the last 50 years. The report uses a new model
for estimating the effect of greenhouse gases on the
climate. 21 NOVEMBER 1998, P. 17
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