Authenticated (18/05/2006) by John Newby, Director of the Sahara Conservation Fund (SCF).
http://www.saharaconservation.org
Sahel: A semiarid region of north-central Africa south of the Sahara desert that stretches across six countries from Senegal to Chad.
Steppe: A biome (or subdivision of the Earth's surface) that is composed of a swathe of temperate grassland stretching from Romania to China. Natural grassland with low rainfall.