Joan Roca i Caball Joan Roca i Caball Joan Baptista Roca i Caball (1898–1976) was a Catalan Carlist and Christian-Democratic politician. He is known as co-founder of Unió Democràtica de Catalunya and recognized as representative of a "Third Spain", the group which emerged during the Spanish Civil War and claimed to have stood in-between the warring factions. He is also counted among leaders of the Catalan opposition to Francoism. The Roca family has traditionally owned vineyards in the Barcelona province; heavily hit by the phylloxera plague in the mid-19th century, it was driven out of business. Joan's paternal grandfather, Antonio Roca Calvet (1840-1917), inherited
Mercury in fish regulations governing the mercury content of a variety of materials. Regulation of these potential sources of pollution reduces the amount of mercury that ends up in fish and, through biomagnification, in humans. In addition to enacting legislation controlling the mercury levels in potential pollutants, Japan has directly influenced the environment by issuing regulations setting acceptable levels of environmental mercury pollution. It is Japan's goal to promote international mercury legislation in hopes of preventing any country from experiencing what it did. Despite Japan's extensive regulation and experience with mercury-based disasters, there is still little information provided to the public. The Japanese