He thinks that the shoes were a gift from God.
This is probably because most people don't really care about why you're sending the email. They just to know what you'd like or what question you have. That's just my guess.
A career field is a group of positions or job series that have occupational relationships
A few other ways to reduce pollution could be to reduce the use of single-used plastics like water bottles, straws and utensils. To recycle properly, as it helps keeps plastic out of the ocean.
Organizing Cleanup campaigns and spreading the word, for example to help remove plastic from a local beach.
To support bans, or the adoption of them in your community. There's many municipalities where there's plastic bags bans or straw bans for example.
We should avoid products containing microbeads (tiny plastic particles), we can find them on face scrubs, toothpastes and bodywashes.
Lastly, we could definitely support organization that address these situations such as Oceanic Society, 5 Gyres, Algalita, etc
Hope this helps!