Abstract
The City of Johannesburg (CoJ)’s existing modes of transport are not sustainable as the vehicles rely on fossil fuel and the natural gas other than renewable energy such as biofuels and biogas. Several African countries are already producing and commercializing biofuels; however, South Africa even though it has a biofuel strategy drafted in 2007; due to food security and political inaction, biofuel is not commercialised. There are 200 small scale producers of biodiesel, which is from used vegetable oils in South Africa. Renewable energies in South Africa has many opportunity and challenges. As South Africa, besides having to consider sustainable transport through the utilization of renewable energy source, it also needs these sources for generating electricity. Hence this study only chose to review the current state of two renewable energies, namely biogas and biofuels. The biofuels are because currently there are small scale biodiesel manufacturers who do not have the stable market for their final products and biogas is one of the selection due to the number of landfills which already exist in South Africa and other waste generation daily converting it into biogas.