Compose a 500 words essay on Discussion Forum 4. Needs to be plagiarism free!In this regard, this paper discusses appropriate solutions to the problem of brownouts using a combination of renewable and non-renewable energy sources, supporting the proposed solution on both economic and environmental grounds.Fundamentally, the non-renewable energy sources, which are the most commonly exploited energy sources, normally deplete at their respective deposits (Walker, 2010). This means that the continued exploitation of the non-renewable sources is not sustainable as compared to the renewable energy sources (Heinberg, 2004). The major sources of non-renewable energy include fossil fuels whose deposits cannot guarantee the energy demands of the future generations. On the other hand, renewable energy sources such as nuclear, hydro, wind and solar energy play an important role in ensuring that the world attains a sustainable energy exploitation and use (Johnston & Master, 2004).&nbsp.Unfortunately, the non-renewable energy sources are heading for depletion leading to rampant situations of brownouts. This is particularly so because the current level of exploitation of the renewable energy sources is not adequate to meet the global demand (Johnston & Master, 2004). This is despite the fact that major players channel enormous amounts of resources to the project each year in attempts to promote the use of cleaner energy for both domestic and industrial purposes. In addition, brownouts occur majorly because a vast majority of the energy created is lost through wastage rather than conservation (Walker, 2010). In this regard, the best suggestion would be that the world be more cautious with the non-renewable energy due to the numerous environmental challenges such as waste disposal and interruption to the ecosystem. An approach that leans towards storing energy would work best for many countries in the reduction of cases of brownouts