Amendment #4 Page 152 of 868 .fetflOg ceMXPI, • renewable power generation's ability to ttilize freely available sources ct fuel this avoiang the rats d puce volatility and market clisruptons associated with many conventional fuel sources • erwironmertal concerns over conventional power generation. and • government polices that encourage development of renewable odwer, such as mil local. provincial, state or local renewable portfolio standard programs. which motivate utilities to procure electncry from renewable resources. In addition to renewal* energy we expect natural gas to grow as a source of electricity generation due to es relatively bw cost and low environmental impact compared bJ other Ices' fuel sources stet) as coal and oil Project operations and generation Cur revenue is unmanly a function of the volume of electnoly generated and sold by our projects Our initial portfolio of power generaton assets is generaay contracted weer long-term PPM with creditworthy counterpanes As of Mardi 31, 2O15 the weighted average remaining efe of our PPM was 19 years. In most instances lancing of the electroty sold under these PPM es ocrtracted for the duration of the contract We also expect that certain of Olt PPM wilt have price escalators based on an index (sten as the consurner price index) or other rates specified in the applicable PPA. Vile define project eve:rat:the( as the actual amount of t me a power generation asset is available to produce electricity divided by the amount of time during the defined measurement period, after excluding the duraton or events such as ant coated maintenance and intercornection inlerrupors Our a billy to generate electricity in an en Intl and cost elfedave manners injected by our ability IC Marian and utiliZe the elect near generation capacity of our reelects The volume of electricity generated and sold by our prqecis along a particular period is also impacted by the number of projects eat have commenced commercial