41.   The quite resilient natural air and water that sustains life may have suffered a critical insult.

42.   The retreat of the westerlies from the United States over the next few days may help sustain the life of the late season storms.

43.   The startling discoveries reveal that the planets may have water and could possibly sustain life.

44.   To call God Mother, we necessarily recognize ourselves as dependent children needing spiritual milk to sustain life.

45.   We can also use the power of debt reduction to relieve poverty and protect the resources that sustain life in the Americas.

46.   And as much as economists will handle issues of pricing, it will have to be hydrologists who evaluate the capacity of river basins to sustain life.

47.   Arnon changed basic understanding of photosynthesis, the process that sustains plant life through the conversion of sunlight, water and carbon dioxide into organic compounds and oxygen.

48.   Deep in the subterranean reaches of the Spider Cave, there is little to sustain life.

49.   He suggested deep waters on the moons of Jupiter or far below the surface of the Martian ice caps as possible areas where life could be sustained.

50.   Hence, the Mars Terraforming Project, which has strewn algae over a stretch of Mars in an effort to create enough oxygen to sustain human life.