The trees not only provide food and income but are also a symbol of peace, prosperity and happiness.
Children are being urged to help replant the olive trees by the YMCAs of Gaza and East Jerusalem and the YWCA of Palestine, who have launched a joint campaign to restore around 50,000 trees, with the help of schools, churches and other groups around the world.
The initiative is backed by Y Care International, the overseas development agency of the YMCA movement.
A pound;20 donation will allow a school to sponsor an olive tree. Please make cheques payable to Y Care International, and send to Olive Tree Campaign, Y Care International, 3-9 Southampton Row, London WC1B 5HY.