Who planted more than one million trees to reduce soil erosion and satisfy demand for household biofuels?

50,000 women as part of the Wangari Maathai Green Belt movement

Explanation:

From the time when Wangari Maathai began the movement in 1977, more than 51 million trees have been planted and more than 30,000 women have received training in forestry, food processing, beekeeping and other trades that help them earn income while preserving their land and resources. Communities in Kenya (both men and women) have been motivated and organized to prevent further destruction of the environment and restore what has been damaged. The main theme of the Green Belt Movement remains to "mobilize community awareness for self-determination, justice, equity, poverty reduction and environmental conservation, using trees as an entry point."

Theses was done by 50,000 women as part of Wangari Maathai's Green Belt movement.

Explanation:

This is a non- governmental organization  founded in 1977 in Kenya  by professor  Wangarri Maattai.  The primary objective of this grassroots movement  was  to ensure conservation of natural resources.

The Green Belt Movemnet(GBM) used tree planting as an avenue  to sensitize women about gender equality,   need to address poverty, to fight for justice.It also focus on the  need to embrace conservation of natural resources, by employ modern method of cooking in order to discourage   usage of firewood which encourage deforestation and to avoid soil erosion.

Profressor Wangari used the millions of tree planted to create awareness of  the movement among the populace especially women, and to empower them.