 Furthermore, if pesticides were not used on fruit and vegetables, their cost would rise, and consequently their consumption would go down, which would cause cancer rates to increase.He goes on to criticize the fear of a vertiginous decline in biodiversity, proposing that 0.7% of species have gone extinct in the last 50 years (as compared to a maximum of 50%, as claimed by some biologists).While Lomborg admits that extinctions are a problem, he asserts that they are not the catastrophe claimed by some, and have little effect on human prosperity.