Pastors pay their Social Security and Medicare tax the same way a self-employed person would, through self-employment tax. This tax is 15.3% of income including the housing/parsonage allowance and is calculated on the Schedule SE that is filed with a minister's tax return each year.
Blue-green algae have a high protein, iron, and other mineral content which is absorbed when taken orally. Blue-green algae are being researched for their potential effects on the immune system, swelling (inflammation), and viral infections.
There are other pigments found in algae that are similar to chlorophyll, though they do not directly capture sunlight. One example is carotenoid, which is a brown pigment (and is found in brown algae which, similar to dinoflagellates, can cause an algal bloom).