Another departure from plastic matters (and we need it sometimes), the Fresh Air Fund is a great cause that supports low-income New York City children for summer vacations. This year you can support their NYC half-marathon racers at the link above.
"Since 1877, The Fresh Air Fund, an independent, not-for-profit agency, has provided free summer vacations to more than 1.7 million New York City children from low-income communities. Last summer, close to 5,000 children visited volunteer host families in suburbs and small town communities across 13 states from Virginia to Maine and Canada. Most children who visit host families are re-invited year after year and form life-long friendships. "