can i say pick up swimming? or learn swimming? can i say pick up swimming? or learn swimming?

is this okay>? The emission will be reduced greatly since the law takes effect.

is this okay>? Normally, I eat snacks when I am watching a video online in the evening. You know, it’s a great pleasure to lie on the couch and enjoying your food with TV on.

is this okay>? It’s for your own and other people’s safety to obey traffic rules.

is this okay>? It would be quite pathetic to live on the bald earth without trees.

is this okay>? air pollution will be less serious with less cars.

is this okay>? For me, it is safer to swim in the pool with lifeguards nearby, whereas I have to keep a watchful eye to the current and maybe jellyfishes in the sea if I swim in the sea.