Answer: brainlist pls and thank you
Explanation:
Cotton gin. Gets rid of seeds 50 times faster.
Postitive effect: thought if would decreased the need for slaves.
negative effect: cotton gin incresed the need for slaves
steam engine: gives engery and better transport by taking water and steam and converting it to engery.
postitive effect: don’t need to be near water also increased better transportation
negative effect: can blow up and cost a lot.
