start energy sources table (chem hhw)

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+\documentclass{article}
+\usepackage[version=4]{mhchem}
+\usepackage[margin=0.2cm]{geometry}
+\pagenumbering{gobble}
+\begin{document}
+
+\title{Comparison of Energy Sources}
+\author{Andrew Lorimer}
+\date{}
+
+\renewcommand{\abstractname}{}
+\maketitle
+
+\begin{center}
+    \begin{tabular}{ | p{0.1\textwidth} | p{0.1\textwidth} | p{0.13\textwidth} | p{0.13\textwidth} | p{0.13\textwidth} | p{0.19\textwidth} |}
+    \hline
+    Energy source & Energy content & Renewability & Environmental impacts of extraction & Environmental impacts of combustion & Key combustion equation/s \\ \hline
+    Coal (brown/black) & Low (black: 34 kJ/g, brown: 16 kJ/g) & Very low - produced by fossilised plant material (thousands of years) & Destruction of vegetation, pollution due to mine waste (tailings etc), greenhouse emmissions from transport \& mining machinery & Acid rain (\ce{SO2}), greenhouse gas emmission & \\ \hline
+    Crude oil & & & Transport by road \& sea releases greenhouse gases.
+ & Toxic \ce{CO} with incomplete combustion, & Complete: \ce{2C16H34(l) + 49O2(g) -> 32CO2(g) + 34H2O(g)} Incomplete: \ce{2C16H34(l) + 17O2(g) -> 32C(s) + 34H2O(g)} \\ \hline
+    Petroleum gas & 48 kJ/g & Refinement causes hydrocarbon pollution of air. & & Uncombusted hydrocarbons may be released (\ce{CO}), causing photochemical smog.
+ & Complete: \hspace{2em} \ce{2C8H18(l) + 25O2(g) -> 16CO2(g) + 18H2O(g)} Incomplete: \ce{2C8H18(l) + 17O2(g) -> 16CO(g) + 18H2O(g)}\\ \hline
+    Coal seam gas & $\approx$ 54 kJ/g (nat. gas)& & Destruction of vegetation \& geology (drilling), pollution of aquifers & Greenhouse gas emmissions & Methane: \hspace{4em}\ce{CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g)} \\ \hline
+    Biogas & Relatively inefficient & & & & \\ \hline
+    Bioethanol & & & & & \\ \hline
+    Biodiesel & & Very renewable – sourced from used cooking oil, tallow, oil seed crops & Consumption of waste (landfill reduction). Less space for agriculture \& forests. Biodegradable. Byproducts (glycerol) can be used elsewhere. & & \begin{align*}\ce{\\C17H29COOCH3(l) + 26O2(g)\\ -> 19CO2(g) + 16H2O(g)}\end{align*} \\ \hline
+
+    \hline
+    \end{tabular}
+\end{center}
+
+\end{document}
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