Artificial photosynthesis energy conversion efficiency (due to photosynthesis' own low efficiency in converting sunlight to biomass), the cost of harvesting and transporting the fuel, and conflicts due to the increasing need of land mass for food production. The purpose of artificial photosynthesis is to produce a fuel from sunlight that can be stored conveniently and used when sunlight is not available, by using direct processes, that is, to produce a solar fuel. With the development of catalysts able to reproduce the major parts of photosynthesis, water and sunlight would ultimately be the only needed sources for clean energy production. The only by-product
Ghetto Day/What I Need "What I Need" and "100% Pure Love", the album's first single, "ooze with giddy abandon—not to mention juicy grooves that seep deeper into the brain and body upon repeated spins." "What I Need" was claimed by "Spin" Bernstein to have "xeroxed" Clivillés and Cole's 1991 single "A Deeper Love". However, he predicted that it could have been a potential successor to her previous signature hits, "Gypsy Woman" and "Makin' Happy". "Ghetto Day" and "What I Need" were released as a double A-side single in June 1994. The joint release peaked at 40 on the UK Singles Chart and at No.