If you wash the green tomatoes and let them dry, you can wrap them in newspaper, and they will ripen and provide you with tasty ripe ones for quite a while.
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You can also put green tomatoes in 1 layer in a cardboard flat, slide them under the bed and they will ripen. If you have a lot thats a little easier than wrapping then in newspaper. When they begin getting ripe just check every coupla days and pull the ripe ones. Remove and compost any that start going bad immediately.