While the popular “Cash for Clunkers” program has been well-liked by car buyers looking for rebates of up to $4,500 for trading in gas-guzzling vehicles for new fuel-efficient cars, charities which rely on vehicle donations for funding are receiving fewer cars and trucks. However, the cash-for-clunkers requirements are stringent, and this leaves some potential customers still donating to the charities. Goodwill Industries International Inc. receives approximately $14.5 million from 28,000 vehicles donated annually to fund job training programs. Similarly, the National Kidney Foundation receives about 30,000 vehicle donations per year, accounting for 18 percent of the charity’s total revenue. The Foundation estimates a 10 to 15 percent decline due to the federal rebates.