Adjective Clause

[Bamdad]

Is sending toxic to the other poor countries, that the best to push a way from our self? is it correct?

Are all waste, which could be very dangerous? is it correct?

Is bury toxic waste,which a good idea? is it correct?

Is toxic waste can be useful for us,which we know to recycle it? is it correct?

[emsr2d2]

Is sending toxic waste to the other poor countries that the best way to push a way from our self get it away from our own country?

Are all waste, which could be very dangerous? Is all waste very dangerous?

Is burying toxic waste,which a good idea?

Is Can toxic waste can be useful for us, which if we know how to recycle it?

See above. I recommend that you revise the use of the words "that" and "which" as they were both used incorrectly in your sentences.