In many countries such as Nigeria, Brazil, and Indonesia, there is a loss of trees. However, in many countries there is the opposite tendency and the number of trees is increasing. In Europe, the USA, Japan, and New Zealand forests have increased in the last 100 years; and in China and Chile over the last 50 years. In India the number of trees has increased between 1970 and 2010, although at the same time the population doubled. The effect has been also attributed to a feel good factor of people with farmers focusing onto the best lands and abandoning marginal lands which are retaken by trees.