Analysis: We regard the total desert area as 1, so the uncultivated desert area was 0.7 in 2002, 0.7x (1-m%) in 2003 and 0.7x (1-m%) in 2004.

Solution: It is planned to green the desert with a greening rate of m% every year. According to the meaning of the problem, the equation is obtained:

0.7x( 1-m%)^2= 1-43.3%

Finishing: (1-m%) 2 = 0.8 1

1-m%= 0.9

Namely: m% = 1 0.9

∴m 1= 10, m2= 190 (irrelevant, omitted)

A: The value of m is 10.