I occassionally volunteer in my spare time by giving blood, improving trout streams, or help at food banks. Do you do any volunteer work?
Not at the moment. I would love to donate blood, but not sure if I can. 
Well, volunteering is an altruistic activity so it comes in many forms. You could try something else if it might be easier!
This is true. So, what is involved in improving trout streams?
Volunteering
Volunteering is generally considered an altruistic activity where an individual or group provides services for no financial or social gain "to benefit another person, group or organization". Volunteering is also renowned for skill development and is often intended to promote goodness or to improve human quality of life. Volunteering may have positive benefits for the volunteer as well as for the person or community served. It is also intended to make contacts for possible employment. Many volunteers are specifically trained in the areas they work, such as medicine, education
volunteer work, such as socio-economic status, opinions held by others, and even current health issues. However, these barriers can be overcome so that if one would like to be involved in volunteer work they can do so. Volunteering improves not only the communities in which one serves, but also the life of the individual who is providing help to the community.
Mental health benefits.
Volunteering is known not only to be related to happiness but also to increase happiness. Also, giving help was a more